• doctor
  • For this reason, if you get diarrhoea that becomes severe or persistent or contains blood or mucus, either during or after taking penicillin, you should consult your doctor immediately. (netdoctor.co.uk)
  • cause
  • It's unlikely that drinking alcohol in moderation will cause problems while you're taking penicillin - it won't affect the medicine. (netdoctor.co.uk)